docstr: Helper function to compute internal column names based on external
  column names
docstr_tok: ["Helper","function","to","compute","internal","column","names","based","on","external","column","names"]
code: def compute_vals(column_names):
      """
      Helper function to compute internal column names based on external
      column names
      """
      return [str(i) for i in range(len(column_names))]
  
file_path: cugraph/python/cugraph/cugraph/structure/number_map.py
imports: from collections.abc import Iterable
  import dask_cudf
  import numpy
  import cudf
  import warnings
label_desc: Use image node_id 4 for calling the NumberMap obj's underlying member method code with example usage: obj.compute_vals(column_names) and returns: unknown